When to people are ass to ass having sex. With two women a dildo is involved. With a man and a woman the mans penis is bent back and penetrating the vagina or anus. The two partners are able to look through their legs at each other while in the position.

I have done this position with my boyfriend several times. It is possible!!

Lets get a little frisky tonight baby, and do it double doggy style.

OR

Did you see those two lesbians doing double doggy style with that big pink dong?

This position is made up. It does not exist. The pleasure factor would be zero therefore making it an erroneous position. Clearly noone would ever fuck like this.
The pre-pubescent fools above me should keep posting about movies and their friends from school because they clearly know nothing about sex.

Find me 2 girls who think that's an enjoyable way to make love and maybe then will I admit it exists.
'Snarkys' definition could possibly be considered valid, but I think 'double doggystyle'(if it did exist) would be a double penetration in the 'doggy' position.